Where’s my period?

Ok, my period is only 2 days late but it’s never, EVER been late before. I had sex three days before my estimated fertile window began. We used the withdrawal method and he didn’t cum anywhere near me. He did re-enter me after cumming but it was after around 30 minutes (sorry for the tmi). Is there a chance I could be pregnant?? This was three weeks ago and I’ve been cramping up and getting all my usual PMS symptoms with no actual period. I’ve thought maybe it’s stress over finals week or the fact that I have a bad cold right now but I’m not sure